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A model-based method to control temperature and humidity in intermittently heated massive historic buildings
Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Department of Art History, Conservation. Czech Tech Univ, Dept Instrumentat & Control Engn, Fac Mech Engn, Tech 4, Prague 16607 6, Czech Republic;Czech Tech Univ, Ctr Adv Aerosp Technol, Fac Mech Engn, Tech 4, Prague 16607 6, Czech Republic.
Czech Tech Univ, Dept Instrumentat & Control Engn, Fac Mech Engn, Tech 4, Prague 16607 6, Czech Republic;Czech Tech Univ, Ctr Adv Aerosp Technol, Fac Mech Engn, Tech 4, Prague 16607 6, Czech Republic.
Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Department of Art History, Conservation.ORCID iD: 0000-0002-5682-6560
2019 (English)In: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 159, article id 106026Article in journal (Refereed) Published
Abstract [en]

The indoor climate of historic buildings is governed not only by human comfort but also the desire to preserve these buildings and their interiors. For preservation, relative humidity is the most important parameter, including its amplitude and change rate. To control the change rate of relative humidity at a heat-up event for an intermittently heated massive historic building with heavy masonry walls, a simplified model for heat and moisture transfer at the heat-up time is presented. A method to derive the time constants and hygrothermal parameters of the building from measurements taken during a step response test is proposed and validated. The model with its parameters can be used to predict both heat-up time to reach the target temperature as well as the amount of moisture gained from the walls. These predictions are in turn used to calculate the decrease in relative humidity during the heat-up event. The indoor air relative humidity is predictable as it is determined by the air temperature and air mixing ratio. A control algorithm that uses the model for predicting and controlling the change rate of relative humidity by shaping the heating power is presented and validated using simulation results.

Place, publisher, year, edition, pages
2019. Vol. 159, article id 106026
Keywords [en]
Indoor-climate control, Historic interior safety, Intermittent heating, Grey-box modelling
National Category
Building Technologies
Identifiers
URN: urn:nbn:se:uu:diva-388755DOI: 10.1016/j.buildenv.2019.03.024ISI: 000471230600001OAI: oai:DiVA.org:uu-388755DiVA, id: diva2:1342843
Funder
Swedish Energy AgencyAvailable from: 2019-08-14 Created: 2019-08-14 Last updated: 2019-08-14Bibliographically approved

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Wessberg, MagnusBroström, Tor

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